Time-domain equations for sound propagation in rigid-frame porous media (L)

Time-domain equations for sound propagation in rigid-frame porous media (L)

A general set of time-domain equations describing linear sound propagation in a rigid-frame, gas-saturated porous medium is derived. The equations, which are valid for all frequencies, are based on a relaxational model for the viscous and thermal diffusion processes occuring in the pores. The dissip...

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Veröffentlicht in:The Journal of the Acoustical Society of America 2004-10, Vol.116 (4), p.1889-1892
Hauptverfasser: WILSON, D. Keith, OSTASHEV, Vladimir E, COLLIER, Sandra L
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Sprache:eng
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Acoustics
Exact sciences and technology
Fundamental areas of phenomenology (including applications)
Physics
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container_end_page 1892
container_issue 4
container_start_page 1889
container_title The Journal of the Acoustical Society of America
container_volume 116
creator WILSON, D. Keith
OSTASHEV, Vladimir E
COLLIER, Sandra L
description A general set of time-domain equations describing linear sound propagation in a rigid-frame, gas-saturated porous medium is derived. The equations, which are valid for all frequencies, are based on a relaxational model for the viscous and thermal diffusion processes occuring in the pores. The dissipative terms in the equations involve convolutions of the acoustic fields with the impulse response of the medium. It is shown that the equations reduce to previously known results in the limits of low and high frequencies. Alternative time-domain equations are also derived based on a Padé approximation.
doi_str_mv 10.1121/1.1785691
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source AIP Journals Complete; AIP Acoustical Society of America
subjects Acoustics
Exact sciences and technology
Fundamental areas of phenomenology (including applications)
Physics
title Time-domain equations for sound propagation in rigid-frame porous media (L)
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